Cosmic rays are particles from outer space that travel across the universe. They can be made by the sun, by other stars exploding, and even black holes. They move extremely fast, nearly the speed of ...

The light travels in a straight line directly from the object to your eye. Ray diagrams are used to show the path that light takes. The rays of light are represented using straight lines ...

The hard X-ray FEL has come of age. A free-electron laser is not like other lasers. It works by forcing a beam of electrons, travelling at nearly the speed of light, to oscillate in a long ...

Ray of Light and Snowflake were the mascots of the Sochi 2014 Paralympic Winter Games. They are space travellers who came to Earth from two different planets. Ray of Light came from a planet that was ...